New Test Method for
Determination of Olefins in Gasoline by Raman Spectroscopy

WK34260

1. Scope

1.1 This test method covers the determination of the total amount of olefins in spark ignition engine fuels and their mixtures with a boiling point up to 225C. Other light liquid hydrocarbon mixtures typically encountered in petroleum-refining operations such as blending stocks may also be analyzed. Results are expressed in volume percent. The application range is 0.3 to 25 % total olefins. 1.2 This test method can be used for analysis of commercial gasolines with or without varying levels of oxygenates such as ethanol, other alcohols, and ethers. 1.3 Units-The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard. 1.4 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

This test method provides for the precise measurement of total olefin content in gasoline with minimal sample preparation and analyst involvement. The typical time for analysis is 5 min. Various federal, state, and local agencies regulate the olefin content of gasoline and the requirements are becoming more stringent. Precise determination of olefin content is critical to compliance with regulatory standards.